linux-kernel - [PATCH] i2o: fix notifiers when max

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070520142728.GB4207@APFDCB5C>
Date:	Sun, 20 May 2007 23:27:28 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Markus Lidel <Markus.Lidel@...dowconnect.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] i2o: fix notifiers when max_drivers is configured

Maxinum number of I2O drivers which could be registered is
configurable by max_drivers module parameter.

But the module parameter is ignored and default value (I2O_MAX_DRIVERS = 8)
is used in the loops to notify all registered drivers.

Cc: Markus Lidel <Markus.Lidel@...dowconnect.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

---
 drivers/message/i2o/driver.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Index: 2.6-mm/drivers/message/i2o/driver.c
===================================================================
--- 2.6-mm.orig/drivers/message/i2o/driver.c
+++ 2.6-mm/drivers/message/i2o/driver.c
@@ -20,6 +20,7 @@
 #include <linux/workqueue.h>
 #include <linux/string.h>
 #include <linux/slab.h>
+#include <linux/log2.h>
 #include "core.h"
 
 #define OSM_NAME	"i2o"
@@ -260,7 +261,7 @@ void i2o_driver_notify_controller_add_al
 	int i;
 	struct i2o_driver *drv;
 
-	for (i = 0; i < I2O_MAX_DRIVERS; i++) {
+	for (i = 0; i < i2o_max_drivers; i++) {
 		drv = i2o_drivers[i];
 
 		if (drv)
@@ -280,7 +281,7 @@ void i2o_driver_notify_controller_remove
 	int i;
 	struct i2o_driver *drv;
 
-	for (i = 0; i < I2O_MAX_DRIVERS; i++) {
+	for (i = 0; i < i2o_max_drivers; i++) {
 		drv = i2o_drivers[i];
 
 		if (drv)
@@ -299,7 +300,7 @@ void i2o_driver_notify_device_add_all(st
 	int i;
 	struct i2o_driver *drv;
 
-	for (i = 0; i < I2O_MAX_DRIVERS; i++) {
+	for (i = 0; i < i2o_max_drivers; i++) {
 		drv = i2o_drivers[i];
 
 		if (drv)
@@ -318,7 +319,7 @@ void i2o_driver_notify_device_remove_all
 	int i;
 	struct i2o_driver *drv;
 
-	for (i = 0; i < I2O_MAX_DRIVERS; i++) {
+	for (i = 0; i < i2o_max_drivers; i++) {
 		drv = i2o_drivers[i];
 
 		if (drv)
@@ -340,8 +341,7 @@ int __init i2o_driver_init(void)
 	spin_lock_init(&i2o_drivers_lock);
 
 	if ((i2o_max_drivers < 2) || (i2o_max_drivers > 64) ||
-	    ((i2o_max_drivers ^ (i2o_max_drivers - 1)) !=
-	     (2 * i2o_max_drivers - 1))) {
+	    !is_power_of_2(i2o_max_drivers)) {
 		osm_warn("max_drivers set to %d, but must be >=2 and <= 64 and "
 			 "a power of 2\n", i2o_max_drivers);
 		i2o_max_drivers = I2O_MAX_DRIVERS;
@@ -349,7 +349,7 @@ int __init i2o_driver_init(void)
 	osm_info("max drivers = %d\n", i2o_max_drivers);
 
 	i2o_drivers =
-	    kzalloc(i2o_max_drivers * sizeof(*i2o_drivers), GFP_KERNEL);
+	    kcalloc(i2o_max_drivers, sizeof(*i2o_drivers), GFP_KERNEL);
 	if (!i2o_drivers)
 		return -ENOMEM;
 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/